clang/tools/clang-fuzzer/fuzzer-initialize/fuzzer_initialize.cpp

   1 //===-- fuzzer_initialize.cpp - Fuzz Clang --------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 ///
   9 /// \file
  10 /// This file implements two functions: one that returns the command line
  11 /// arguments for a given call to the fuzz target and one that initializes
  12 /// the fuzzer with the correct command line arguments.
  13 ///
  14 //===----------------------------------------------------------------------===//
  15
  16 #include "fuzzer_initialize.h"
  17
  18 #include "llvm/InitializePasses.h"
  19 #include "llvm/PassRegistry.h"
  20 #include "llvm/Support/TargetSelect.h"
  21 #include <cstring>
  22
  23 using namespace clang_fuzzer;
  24 using namespace llvm;
  25
  26
  27 namespace clang_fuzzer {
  28
  29 static std::vector<const char *> CLArgs;
  30
  31 const std::vector<const char *>& GetCLArgs() {
  32   return CLArgs;
  33 }
  34
  35 }
  36
  37 extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv) {
  38   InitializeAllTargets();
  39   InitializeAllTargetMCs();
  40   InitializeAllAsmPrinters();
  41   InitializeAllAsmParsers();
  42
  43   PassRegistry &Registry = *PassRegistry::getPassRegistry();
  44   initializeCore(Registry);
  45   initializeScalarOpts(Registry);
  46   initializeVectorization(Registry);
  47   initializeIPO(Registry);
  48   initializeAnalysis(Registry);
  49   initializeTransformUtils(Registry);
  50   initializeInstCombine(Registry);
  51   initializeTarget(Registry);
  52
  53   CLArgs.push_back("-O2");
  54   for (int I = 1; I < *argc; I++) {
  55     if (strcmp((*argv)[I], "-ignore_remaining_args=1") == 0) {
  56       for (I++; I < *argc; I++)
  57         CLArgs.push_back((*argv)[I]);
  58       break;
  59     }
  60   }
  61   return 0;
  62 }